| 摘要 |
PURPOSE:To register a key number for incoming limit service exercising connection control by deciding on incoming propriety by making a decision on wrong or right by previously specifying the key number and then by letting an originating subscriber dial the key number and incoming telephone number. CONSTITUTION:To registrate a key number from a corresponding telephone set, a specific number, key-number registration discrimination number and key number are dialed for orginating via route (1), i.e. a connection to a service control network, and then a switchboard generates orginating telephone information by itself to send the key-number registration discrimination number and key number to the service control network via route (2). In the service control switchboard, receiver RG completes the registration of the key number at a fixed position of a key-number registration memory part corresponding to a subscriber by received information, and then registration end information is sent out to the switchboard via route (3) by way of transmitter SND. On receiving the information, the switchboard changes the state of the ket-number registration discrimination memory into an incoming limit registration state to send the memory end information to the service control switchboard via route (4). This switchboard decides on registration completion and key- number registration completion from arrival completion information. |
